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sugarbeet root maggot
All Crops All Locations
Posted on: June 3, 2008 by Jerry Neufeld
Dr. Clint Shock, Superintendent at the OSU Malheur Experiment Station is reporting that sugarbeet root maggots have been found in Malheur County sugarbeet fields. If you have sugarbeet plants in your field that are dying for no apparent reason, dig up the sugarbeet plants and look for the small white maggots and damage to the roots. The images below show the maggot larvae and the damage they cause. If you suspect you have this pest, contact your Amalgamated Sugar Company fieldman for treatment options.
Codling Moth First Generation Cover Spray
Tree Fruits Treasure Valley - Idaho
Posted on: May 22, 2008 by Tony McCammon
Codling Moth Degree Days have reached critical temperatures and eggs will be hatching this weekend. On Friday May 23rd 1% of Eggs will be hatching in all parts of the Treasure Valley. Cover Sprays should be applied according to label instructions for control on codling moth on apples and pears.
Many of you should apply your first codling moth treatment to catch the first few eggs that are hatching. Please keep in mind that if you use a pyrethroid such as Warrior, chose a pesticide from a different class for your second spray, such as Assail, Calypso, Intrepid, or Imidan. Insects can develop resistance to pyrethroids very quickly.
Altacor and Delegate are available in small quanities from Wilbur Ellis. Call Tom Tankersley for more information.
Synthetic Insecticides*
Chloronicotinyls:
• acetamiprid (Assail)
• clothianidin (Clutch)
• thiacloprid (Calypso)
Insect Growth Regulators:
• azadirachtin (Aza-Direct, Azatin)**
• methoxyfenozide (Intrepid)
• novaluron (Rimon)
• pyriproxyfen (Esteem)
• tebufenozide (Confirm)
Organophosphates:
• azinphosmethyl (Guthion)
• chlorpyrifos (Lorsban), apples only
• diazinon (Diazinon)
• dimethoate (Dimethoate)
• malathion (Malathion)**
• phosmet (Imidan)
Carbamates:
• carbaryl (Sevin)**
• indoxacarb (Avaunt)
Synthetic pyrethroids:
• esfenvalerate (Asana)
• fenpropathrin (Danitol)
• lambda-cyahalothrin (Warrior)
It is important for commercial growers to continue to
monitor the codling moth population with pheromone
traps throughout the season. This information will help you to determine how well your treatment program is working.
If you are using Mating Disruption, use two different types of lures:
• one trap with a 10x or DA-Combo lure to monitor
moth flight (the 10x lure has a very high dose of pheromone for male moths and the Combo lure has a “pear
ester” that also attracts female moths), and
• one trap with a 1x lure; if you catch NO moths in this
trap, you know your mating disruption is working (the
1x lures have a lower dose of pheromone that trap male
moths only)
Alfalfa Weevil Larvae
All Crops All Locations
Posted on: May 22, 2008 by Steve Norberg
On 5/21/08 Steve Norberg confirmed that Alfalfa Weevil Larvae were in high numbers in a field near Ontario. With the cooler weather in our area slowing alfalfa growth we may have more problems with this pest. I encourage you to scout your alfalfa fields for this pest.
Alfalfa Weevil Larvae are about 0.4 of an inch long, yellow to green,, with a white stripe down the back. They feed in and on the buds and leaves of alfalfa.
Sampling and thresholds
Treat when-
1. Thirty percent of plant terminals show feeding damage. Either cut and then treat stubble or treat the standing crop, depending on how close to cutting it is.
2. Damage is noticeable 1 week or more before estimated cutting time, and larvae exceed 10 per 90 degree sweep, sometimes called a straight-line sweep.
3. Larvae number 20 or more per sweep (180 degree sweep , sometimes called a half sweep), Thresholds based on larvae per sweep are a general guideline; weather, plant vigor, irrigation schedules, cutting date, history of weevils in the area, and a complex of other factors may determine whether treatment is warranted.
For pictures and more information see:
http://www.pnwpestalert.net/reference/Crops~~Alfalfa~~Alfalfa+Weevil~~.html
Steve Norberg, Field Crops and Watershed Management, OSU Extension Malheur County
onion thrips
All Crops Treasure Valley - Idaho
Posted on: May 20, 2008 by Jerry Neufeld
Dr. Mike Thornton, is reporting he is starting to see onion thrips in the onion fields near Parma. This is early given the growth stage of the plants, but about the same time they showed up last year. He is also seeing thrips on volunteer onions in nearby corn fields. Volunteer onions are a likely source of Iris Yellow Spot Virus that can move into this year’s onion fields with adult thrips. Controlling volunteer onions in fields near onion fields will help reduce the threat of thrips transmitting Iris Yellow Spot Virus to your onion fields. This is a good time to start scouting onion fields for this pest.
Fruit Grower Meeting - Marsing
Tree Fruits Treasure Valley - Idaho
Posted on: May 19, 2008 by Tony McCammon
Proper Soil and Nutrient Management will increase fruit marketablility. Mir Seyedbagheri UI Educator in Elmore County will present on these topics wednesday at 11:00 At the Sandbar Restaurant in Marsing. 18 1st Ave W, 896-4124.
See you there!
Tony McCammon
Lygus bug
All Crops Treasure Valley - Idaho
Posted on: May 16, 2008 by Jerry Neufeld
The Lygus degree day calculator hosted by Integrated Plant Protection Center at Oregon State University and the IPM Centers - PNW Coalition (http://pnwpest.org/cgi-bin/ddmodel.pl?spp=lyg) shows that, depending on your location in the Treasure Valley, we have accumulated 215-224 degree days since January 1, 2007. Peak emergence of lygus bug 1st and 2nd instar nymphs should occur right around 272 accumulated degree days: this usually, but not always, occurs around mid-May, and is the time monitoring for lygus bugs in alfalfa seed fields should begin. Right now that is predicted to occur on about May 18 or 19.
When using most insecticides, fields should be treated when numbers of lygus bugs reach 4-5 lygus bug nymphs per 180 degree sweep. Growers using Rimon, Assail, or Beleaf, as stand-alone sprays should treat before 4th instar nymphs are detected. You can monitor degree day accumulation using the link provided above and:
1) Select “ lygus bug [alfalfa seed]Ben Simko 2000” degree day model from the “Select degree day model….” drop down box at the top of the form
2) In the “Select location” box, select a location in the drop down box best describing your location (e.g. “parma id agrimet” in the “Washington, Idaho” box if you want information for a field near Parma). Make sure to select “None” at the top of the lists in the other two location boxes.
3) Leave the “Or upload your own…” box blank
4) In the “Forecast:” area, enter the your zip code or your city, state in the “NWS zipcode/city, state” box, or the location nearest your field from the “or weather.com site” drop down box to the right). This selection forecasts 7 days forward based on the local weather forecast (beyond 7 days the forecast is based on the historical average). The predicted date of peak 1st and 2nd instar will vary depending on the forecast location selected, so pick the one closest to your location. Select “none” to have the forecast based only on the historical average.
5) Select the location nearest your field in the “Select historical average forecast location” area. Your selection here should match, as close as possible, your selection in the “Select location” area above: there may not be an exact match. As above, select “none” in the other two boxes.
6) Make sure the “Table” and “graph” boxes are checked (and the “precipitation” if you want rainfall information) and click the “Calc” button. A table with the current degree day accumulations matching your selection should appear. There should also be a graph near the bottom showing the current year accumulation compared to the historical average for your selections.
Additional updates will be posted as the 272 degree day accumulation target approaches.
This information was provided by Dr. Jim Barbour, IPM Specialist with the U of I at the Parma R and E Station.
Cereal Leaf Beetle
Small Grains Treasure Valley - Idaho
Posted on: May 15, 2008 by Jerry Neufeld
Jim Barbour, Steve Reddy and I (U of I), along with Phil Allison (Landview Fertilizer) and Ben Simko (ISDA) are conducting a cereal leaf beetle study in Canyon and Owyhee County this spring. Several years ago a parasite of the cereal leaf beetle larvae was released in four Treasure Valley locations. We will be collecting CLB larvae from across the Treasure Valley and dissecting them to look for the larval parasite in an effort to determine the distribution of the parasite. As part of that effort, in recent days we found many CLB adults in winter and spring grain fields and also found a few CLB eggs. According to the growing degree day model we are right at the time that increased CLB activity should be taking place. When you are scouting in the next few days, I think you will see more CLB eggs and larvae. We will be scouting grain fields once per week for the next month and collecting CLB larvae as part of this project. If you have spring grain fields you would like us to check out give me a call at 459.6003.
Test Alert
All Crops Treasure Valley - Oregon
Posted on: May 13, 2008 by Matt Goodale
Test alert... please disregard.
Test Alert
All Crops Treasure Valley - Oregon
Posted on: May 13, 2008 by Matt Goodale
Test alert... please disregard.
Test Alert
All Crops Magic Valley
Posted on: May 13, 2008 by Matt Goodale
Test alert - please disregard. The system is undergoing testing at the moment.
Test Alert
All Crops Treasure Valley - Oregon
Posted on: May 13, 2008 by Matt Goodale
Test alert.
If you see this alert, the system is undergoing testing. Please disregard.
Fruit Grower Meeting
Tree Fruits Treasure Valley - Idaho
Posted on: May 12, 2008 by Tony McCammon
Marketing and protecting our fruit are at the top of the list for fruit growers. Wednesday at 11:00 at Nichols Steakhouse in Fruitland representatives from the ISDA will discuss what they are doing and what you can do to protect your fruit from abandoned orchards. The Idaho Preferred program will talk about marketing opportunities for your fruit. If you have any questions on this meeting call Tony McCammon at 642-6022.
sugarbeet root maggot
All Crops Treasure Valley - Idaho
Posted on: May 12, 2008 by Jerry Neufeld
Field representatives from the Amalgamated Sugar Company are reporting we reached the growing degree day threshold for sugarbeet root maggot fly emergence late last week in the Nyssa area. Adult sugarbeet root maggot flies will begin emerging and flying anytime now.
Adult flies will lay eggs near the sugarbeet plants 3 to 10 days after they emerge. After the larvae hatch they will begin feeding on the young sugarbeets. Potential maggot damage could be worse this year since there are so many replanted fields with small beets at the time the maggots are feeding. Look for these pests to appear in the western end of the Treasure Valley first. If you haven’t applied a treatment for sugarbeet root maggot, contact your White Satin fieldman for further information.
» Sugarbeet Root Maggot Larvae
Rimon Ovicide degree day applications
Tree Fruits Treasure Valley - Idaho
Posted on: May 7, 2008 by Tony McCammon
The Rimon label states that it wants to be on between 50-75 degree days(DD) in Western states. If we Include the success of the trials Wilbur Ellis completed with this product, appling material at 100 and 1000 DD,
The 1st generation has a window that could be from 50 to 100 DD giving large orchadists a little more time to cover their acres. The 2nd generation should be applied starting at 1000 degrees. Submitted by Tom Tankersly
Estimating DD with the projected forcast expect to reach 50 DD on Monday in most parts of the Treasure Valley.
Good Luck!
Codling Moth Biofix all Over Treasure Valley
Tree Fruits Treasure Valley - Idaho
Posted on: May 6, 2008 by Tony McCammon
Biofix for Codling moth was reached May 5 in all locations in the treasure Valley. Emmett, Sunnyslope, Parma, Fruitland, and the Upper Snake River Valley all caught 4 or more moths. Altacor has recieved federal Registration and are wating on State registration. Ovicides should be purchased for this weekends application. Apply Ovicides at 70 to 100 degree days. Further information on Codling Moth control with be forthcoming.
Tony McCammon
Cereal Leaf Beetle
All Crops Treasure Valley - Idaho
Posted on: May 5, 2008 by Jerry Neufeld
Dr. Brad Brown from the UI Parma Research and Extension Center is reporting that with the warmer weather, cereal leaf beetle adults can be seen flying and egg laying is beginning. It is not too early to start scouting for CLB eggs as an indication of potential larvae populations. Spring planted grains are preferred by CLB over winter planted grains.
ISDA Pesticide Disposal Program
Announcements Treasure Valley - Idaho
Posted on: April 30, 2008 by Jerry Neufeld
The Idaho State Department of Agriculture is sponsoring a pesticide disposal program in the Treasure Valley on May 12 and 13, 2008.
Click on the thumbnail at the bottom of this alert for more information.
pesticide disposal program
All Crops Treasure Valley - Idaho
Posted on: April 30, 2008 by Jerry Neufeld
The Idaho State Department of Agriculture is sponsoring a pesticide disposal program in the Treasure Valley on May 12 and 13, 2008. Click on the thumbnail at the bottom of this alert for more information.
Potential Freeze Damage to Cereals
Small Grains All Locations
Posted on: April 29, 2008 by Steve Norberg
On Monday April 21 temperatures plummeted in the Treasure Valley Area. Readings at the Malheur Experiment Station went as low as 21 F. The effect on winter cereals in the area will be dependent on the stage of the crop on that day. Those fields that had the growing point above ground (jointing) when this freeze event came may have moderate to severe damage. Producers can split open some stems and check the developing head. If the head is green or light greenish in color and seems firm, it is probably fine. If the head is yellowish and mushy, it may have freeze injury.” Healthy tillers will help compensate for yield losses to main stems. The links below have a summary of growth stages, the temperatures required for wheat and barley freeze damage, primary symptoms and yield effects.
Please see pages two and three of the Growing Treasure in the Valley Newsletter found at
http://extension.oregonstate.edu/malheur/Agriculture/Newsletters/Gr%20Tr_Apr_2008.pdf.
Other references can be found at: http://www.oznet.ksu.edu/library/crpsl2/c646.pdf
and
http://www.uidaho.edu/so-id/entomology/bulletin_724.htm
